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Abstract
This work included the preparation and in-vitro bioactivity studies
of glass, ceramic and glass / ceramic composite samples with different
compositions using infrared reflection spectroscopy, (IR) and scanning
electron microscope, (SEM) techniques. The formation of the hydroxy
apatite (HAP) layer, which is the only indication of the bioactive
properties of the samples, is detected on the surfaces of the samples after
their immersion in the simulated body fluid (SBF) using IR of SEM.
Characterization of the prepared bioactive samples through their
mechanical properties was also studied.Infrared reflection spectra of bioactive glass, ceramic and glass /
ceramic composite surfaces before and after their immersion in the
simulated body fluid (SBF) exhibited that there is a relationship between
the composition of composite samples and their bioactivities.
The infrared reflection spectra were detected using FTIR
spectrometer in the wave number range (2000 – 400 cm-1) and showed
that all prepared samples have biological behavior with different rates, i.e
the ability of samples to form HAP layer on their surfaces is higher in
case of composite samples containing highly durable phosphate glass and
lower in the case of composite samples containing low – durable silicate
glass.
The photo-micrographs of the samples surfaces confirm the above
results through the formation of granules of HAP layer.
The compressive strength measurements indicated that the glass /
ceramic composites are qualified to be used as bone replacement for
highly – load region in the body.The photo-micrographs of the samples surfaces confirm the above
results through the formation of granules of HAP layer.
The compressive strength measurements indicated that the glass /
ceramic composites are qualified to be used as bone replacement for
highly – load region in the body.
Glass / ceramic composites containing phosphates glass formed
wollastonite, combeite, calcium phosphate, devitrite, and whitlockite
phases. While as the composites containing silicate glass formed
wollastonite, devitrite, cristobalite, whitlockite and sodium phosphate
phases which were responsible for their biological behavior and
mechanical properties.